He argued that the overcrowded cities were the product of a system based on "selfishness" and "rapacity."

他辩称说，过分拥挤的城市是建立在“自私”和“贪婪”基础上的制度造成的。

《柯林斯英汉双解大词典》

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It created a simple system based around the idea of setting goals.

根据事先设定的目标，创造出简洁实用的系统。

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One showed that adults are much more cooperative if they work in a system based on rewards.

VOA: special.2009.10.21

Democracy, in final analysis,is a system of governance based not only in trust but also distrust.

归根结底，民主就是治理体系,不仅基于信任，也以不信任为基础。

麻省理工公开课 - 媒体、教育、市场课程节选

They wanted to continue their economic system based on agriculture and slavery.

VOA: special.2011.04.09

The FBI is seeking to develop an early-warning system based on material "scraped" from social networks.

BBC: FBI plans social network map alert mash-up application

They would be well-suited to build the parameters for a reputation system based on civic engagement.

FORBES: Is Trust Being Replaced By Reputation?

The unions say the tests should be replaced with a voluntary system based on teachers' assessments.

BBC: Schools may try to boycott Sats